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Q: If an op-amp were perfect the CMRR would be what?
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Why it is desirable for an op amp to have a high CMRR?

A high CMRR prevents the opamp from passing undesirable common mode signals.


What is CMRR?

CMRR is common mode rejection ratio. it is the ratio of Differential gain to common mode gain. CMRR=Ad/Ac


Why is the unit of CMRR?

pseudo


Why decibel is the unit of CMRR?

pseudo


Similarity between opamp and comparator?

A comparator is simply an opamp with a certain configuation of external circuitry ( a few components) that make it function as a comparator.


Is IC741 a hybrid ic?

no, the 741 opamp is a monolithic IC.


IC 741 is an?

It is an opamp chip consisting of 8 pins


Why voltage gain is high in op amp?

A practical opamp is designed to approach the characteristics of the ideal opamp as closely as possible. The open loop voltage gain of an ideal opamp is infinite, so while this is actually impossible to achieve practical opamps are built with as high an open loop voltage gain as possible.


Where is the ground on an operational amplifier?

An opamp has a ground terminal on one of the pins.


A differential amplifier is used In input stage of op-amps to achieve very high?

CMRR


Which of following OP amp is used to strengthen the week signal?

741 opamp


What is the applications opamp buffer circuit?

An opamp buffer circuit is one where the input signal is connected to the plus input, and the output is connected to the minus input. Within the performance limitations of the opamp, the output will track the input. The advantage of the buffer circuit is that is presents very little load impedance to the input signal, while providing a low impedance from the output to drive whatever circuitry is connected there.